const list = [
   { id: 3, name: "张三丰" },
   { id: 5, name: "张无忌" },
   { id: 13, name: "杨逍" },
   { id: 33, name: "殷天正" },
   { id: 12, name: "赵敏" },
   { id: 97, name: "周芷若" },
];
for (let a of list) {
   a.id = a.id * 2;
   var key = "updateTime";
   var value = "2020-11-03 16:33";
   a[key] = value;
}
console.log(list);